There's a video about these mice also. Found it on Ars Technica: http://arstechnica.com/hardware/news/2009/...itouch-mice.ars
I just with my Microsoft IntelliMouse Explorer wireless had in-built rechargeable batteries that could be recharged either via a dock or USB cord. That's a free ideal I'll bounce off them for product improvement if they read this, and something they can do instead of the way things are now having to constantly take batteries out and put new ones in since the mouse is a hungry little battery zapper.